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ZVS Synchronous Buck Converter with Improved Light Load Efficiency and Ripple-Free Current

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Book cover Advances in Multimedia, Software Engineering and Computing Vol.1

Part of the book series: Advances in Intelligent and Soft Computing ((AINSC,volume 128))

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Abstract

A zero-voltage-switching (ZVS) synchronous buck converter with improved light load efficiency and ripple-free current is proposed in this paper. An auxiliary circuit is added to a conventional buck converter. The auxiliary circuit provides a ripple-free current and ZVS feature. Due to the ZVS feature, the switching loss is significantly reduced. However, the conduction loss due to the auxiliary circuit increases. Especially at light loads, the conduction loss is much larger than the switching loss. Therefore, by disabling the synchronous switch at light loads, the circulating current in the auxiliary circuit is reduced and the efficiency at light loads is improved. The operation principle and steady-state analysis of the proposed converter are provided. A prototype of the proposed converter is developed, and its experimental results are presented for validation.

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References

  1. Abedinpour, S., et al.: A multistage interleaved synchronous buck converter with integrated output filter in 0.18 um SiGe process. IEEE Trans. Power Elec. 22, 2164–2175 (2007)

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  2. Chiang, C.Y., et al.: Zero-voltage-switching control for a PWM buck converter Under DCM/ CCM boundary. IEEE Trans. Power Elec. 24, 2120–2126 (2009)

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  3. Li, W., et al.: A family of interleaved boost and buck converters with winding-cross-coupled inductors. IEEE Trans. Power Elec. 23, 3164–3173 (2008)

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Author information

Authors and Affiliations

  1. Department of Electronic & Information Engineering, Seoul National University of Science and Technology, Seoul, South Korea

    Hyun-Lark Do

Authors
  1. Hyun-Lark Do
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Editors and Affiliations

  1. International Science & Education, Researcher Association Wuhan Section, Wuhan University, Special No.1, Jiangxia Road of Wuhan, Wuhan, China, People’s Republic

    David Jin

  2. ISER Association, Guangshan Road, Baoli Garden 1, 430072, Wuhan, China, People’s Republic

    Sally Lin

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© 2011 Springer-Verlag Berlin Heidelberg

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Do, HL. (2011). ZVS Synchronous Buck Converter with Improved Light Load Efficiency and Ripple-Free Current. In: Jin, D., Lin, S. (eds) Advances in Multimedia, Software Engineering and Computing Vol.1. Advances in Intelligent and Soft Computing, vol 128. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25989-0_17

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  • DOI: https://doi.org/10.1007/978-3-642-25989-0_17

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-25988-3

  • Online ISBN: 978-3-642-25989-0

  • eBook Packages: EngineeringEngineering (R0)

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